code: def test_fast_slow_arg_function_np():
      # test that _fast_arg() and _slow_arg() return "externally"
      # defined functions like numpy functions as-is:
      assert _slow_arg(np.mean) is np.mean
      assert _slow_arg(np.unique) is np.unique
      assert _fast_arg(np.mean) is np.mean
      assert _fast_arg(np.unique) is np.unique
  
imports: import inspect
  from functools import partial
  from io import StringIO
  import numpy
  import pytest
  from cudf.pandas.fast_slow_proxy import _fast_arg, _FunctionProxy, _slow_arg, _transform_arg, _Unusable, make_final_proxy_type, make_intermediate_proxy_type
label_desc: Use image node_id 7 for calling a global function with example usage: test_fast_slow_arg_function_np() without return types